Under water pump



April 1965 c. McCLELLAN PHILLIPS 3,176,621

UNDER WATER PUMP Filed Nov. 29, 1965 E FN United States Patent thee 3,,i?,h2l Patented Apr. 6, 1965 3,176,621 UNDER WATER PUNK? Curtis McClellan Phillips, Rudyard, Mont. Filed Nov. 29, 1963, Ser. No. 326,783 2 Claims. (Cl. 103-92) This invention relates to water pumps, having particular reference to an under water pumping unit with double impeller means by which water may be forced through an outlet pipe for either pumping or for power driven boats and like water craft.

In the art to which the invention relates, impellers mounted for rotation in a casing into which Water is drawn by impeller means and expelled from the casing through a discharge pipe are commonly known.

The present invention is designed to efiect improvements over devices of this character to increase the volume of water expelled from the casing in pumping relative to the power used, or to greatly increase the power obtainable at the casing outlet for driving a water craft.

In this a single power driven shaft is used extending axially through a main water receiving casing having a delivery outlet pipe, and on both sides of the casing are impellers in the form of oppositely turned spiral blades mounted in complementary conical casings that are connected to deliver water to the water receiving casing from which it is expelled through the outlet pipe.

Other features and advantages of the invention will become apparent by reference to the accompanying description taken in conjunction with the drawings.

In the drawings, wherein is illustrated a preferred embodiment of the invention.

The figure is a side view of a pump casing with drive shaft and impellers in accordance with my invention and including the mounting of the casing, shown with parts broken away and partly in section.

Having reference to the drawings a shaft 1 is mounted rotatable in bearing elements 2 that are connected by upper and lower frame bars 3 and 4 fixed on the bearing elements. Mounted on the shaft 1 is a drive pulley 5 to be belt driven from a source of power, and the shaft is held against endwise movement in the bearing elements by collars 6 held by set screws 7.

The frame bars 3 and 4 include flat end portions 8 attaching to the bearing elements, as by welding, and from these end portions the frame bars have oppositely outwardly diverging portions 9 and parallel center portions 19, between which latter is mounted a water receiving casing 11. The casing 11 has an outlet 12 with discharge pipe 13 fixed to the casing for delivery of water from the outlet.

The casing 11 is cylindrical, having a circumferential wall 14 and flat end walls 15. In each of the end walls is a water inlet opening 16 in which are fixed, as by welding, truncated conical inlet casings 17 and 18, the casings having their truncated ends mounted in the casing inlet openings.

The shaft 1 passes axially through the conical inlet casings 1'7 and 18, and has fixed thereto sleeves 19 on which are mounted fixed to the sleeves oppositely turned spiral impeller blades 20 that are inwardly tapered complementary to the conical casings and are adapted when the shaft 1 is rotated to be turned with the shaft and force Water into the casing from both'sides through the inlet openings 16 from the surrounding water in which the pump would be immersed, and discharge the water through the pipe 13.

, Inthe use of the device the pump would be immersed in the water that is to be forced through the water receiving casing 11 and discharge pipe 13 by the spiral impeller blades 20. The shaft 1 would be connected by the pulley wheel 5 to be belt driven from an engine or other source of power. The double impeller blades are designed to force a greater volume of water through the discharge pipe 13 relative to the power employed, and such a unit may be used either for pumping water, or as a power transmitting unit in a boat or other Water craft.

What I claim is: g

1. In an under water pumping unit a shaft, means on the shaft by which it may be connected to be driven, hearing elements in which the shaft is rotatably mounted, frame bars connecting the bearing elements, a cylindrical casing mounted in the frame bars, said casing having flat ends with water inlet openings through which the shaft passes and a discharge outlet, truncated conical inlet casings mounted in the water receiving casing inlet openings with the shaft passing axially therethrough and with the truncated ends of the inlet casings inward, and spiral blades mounted on the shaft in the conical casings, said blades tapering complementary to the conical casings.

2. In an under water pump unit including a shaft connectable to be driven, a water receiving casing comprising an enlarged central chamber having oppositely axially spaced end walls, said end walls having water inlet openings and said casing having a water outlet, means mounting the casing with the shaft passing through the casing inlet openings, a truncated conical casing mounted in each of the casing inlet openings, said conical casings having small truncated ends which are of substantially less diameter than the other ends thereof secured to said end walls, and oppositely turned spiral blades fixed on the shaft within the conical casings, said blades tapering complementary to the conical casings.

References Cited by the Exaer UNITED STATES PATENTS KARL J. ALBRECHT, Primary Examiner. JOSEPH H. BRANSON, JR., Examiner 

1. IN AN UNDER WATER PUMPING UNIT A SHAFT, MEANS ON THE SHAFT BY WHICH IT MAY BE CONNECTED TO BE DRIVEN, BEARING ELEMENTS IN WHICH THE SHAFT IS ROTATABLY MOUNTED, FRAME BARS CONNECTING THE BEARING ELEMENTS, A CYLINDRICAL CASING MOUNTED IN THE FRAME BARS, SAID CASING HAVING FLAT ENDS WITH WATER INLET OPENINGS THROUGH WHICH THE SHAFT PASSES AND A DISCHARGE OUTLET, TRUNCATED CONICAL INLET CASINGS MOUNTED IN THE WATER RECEIVING CASING INLET OPENINGS WITH THE SHAFT PASSING AXIALLY THERETHROUGH AND WITH THE TRUNCATED ENDS OF THE INLET CASINGS INWARD, AND SPIRAL BLADES MOUNTED ON THE SHAFT IN THE CONICAL CASINGS, SAID BLADES TAPERING COMPLEMENTARY TO THE CONICAL CASINGS. 